definition of drosophila
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Drosophila a genus of fly, which includes Drosophila melanogaster, the Mediterranean fruit fly. It is useful in genetic experiments because of the large chromosomes found in its salivary glands and its sensitivity to environmental effects, such as exposure to radiation.
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Sex Determination In birds and most reptiles, however, it is the opposite: XX individuals are male and XY individuals are female. In fruit flies (Drosophila), XX is female and XY is male, but the Y is inert and the sex is determined by whether there are two X chromosomes or only one. (Thus, XO is female in humans but male in Drosophila.
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monarch 2. monarch-large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed. Danaus plexippus, milkweed butterfly, monarch butterfly. danaid, danaid butterfly-large tropical butterfly with degenerate forelegs and an unpleasant taste.
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Genetics 2 A dominant gene b+ is responsible for the wild-type body color of Drosophila; its recessive allele b produces black body color. A testcross of a heterozygous b+/b female by a black b/b male gave 52 black and 58 wild-type progeny.
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- 1 You'll see enlarged illustrations of fruit flies, Drosophila melanogaster. ( 2 In our real exhibit you'd be looking at the actual flies crawling around, looking for food or grooming their wings.). 3  Compare the mutated flies to the normal flies.
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- BIOLOGICAL OVERVIEW Recent literature Arias, C., Fussero, G., Zacharonok, M. and Macias, A. (2015). Dpp-expressing and non-expressing cells: two different populations of growing cells in Drosophila. PLoS One 10: e0121457. PubMed ID: 25798905 Summary: There are different models that explain growth during development.
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Definitions &Translations Chambers 20th Century Dictionary(0.00 / 0 votes)Rate this definition: ef-em′er-a, n. the Mayfly, a genus of short-lived insects: that which lasts a short time.—adj. Ephem′eral, existing only for a day: daily: short-lived.—n. anything lasting a short time.—ns.
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butterfly noun, plural butterflies. 1. any of numerous diurnal insects of the order Lepidoptera, characterized by clubbed antennae, a slender body, and large, broad, often conspicuously marked wings. 2. a person who flits aimlessly from one interest or group to another: a social butterfly.
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drosophila (Animals) any small dipterous fly of the genus Drosophila, esp D. melanogaster, a species widely used in laboratory genetics studies: family Drosophilidae. They feed on plant sap, decaying fruit, etc.
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- Check your grammar now! : a biological classification based upon morphological and anatomical relationships and affinities considered in the light of phylogeny and embryology; specifically : a system in botany other than the artificial or sexual system established by Linnaeus.
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Segmentation gene Segmentation gene. Definition. noun, plural: segmentation genes. (1) Any of the genes involved in the early stages of pattern formation in the embryo. (2) A zygotic gene responsible for the formation of body segments.Supplement. The segmentation genes are classified into three groups: gap genes, pair-rule genes, and segment polarity genes.In Drosophila, the segmentation genes code for products responsible in forming stripes or segments in the fruit fly embryo. See also: zygotic gene.1) Any of the genes involved in the early stages of pattern formation in the embryo. (2) A zygotic gene responsible for the formation of body segments. Supplement. The segmentation genes are classified into three groups: gap genes, pair-rule genes, and segment polarity genes.
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Trypanosoma a genus of parasitic organisms, several species of which can cause significant diseases in humans. Most Trypanosoma organisms live part of their life cycle in insects and are transmitted to humans by insect bites. See also trypanosome, trypanosomiasis.
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- Drosophila has a diploid chromosome number of eight, or four pairs of homologouschromosomes numbered 1 - 4. Chromosome 1 is the X chromosome (sex chromosome) and isresponsible for sex determination in the fruit fly.. Determining if a mutant is dominant or recessive, and if it is X-linked or autosomal. To determine if a mutant is dominant or recessive, and if it is X-linked or autosomal, youperform a pair of reciprocal crosses. In a pair of reciprocal crosses, the gender of the parents isreversed.
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drosophila We find this same process of interchange of characters taking place in each of the other three groups of drosophila. A Critique of the Theory of Evolution Thomas Hunt Morgan Why interchange takes place in the female of drosophila and not in the male we do not know at present.
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- Snowball becomes the scapegoat in Napoleon's plans, and everything that comes to harm Napoleon's regime will be blamed on Snowball. The remainder of Animal Farm is a chronicle of the consolidation of Napoleon's power through clever politics, propaganda, and terror.
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Glial cell biology in Drosophila and vertebrates Glia are the most abundant cell type in the mammalian nervous system and they have vital roles in neural development, function and health.However our understanding of the biology of glia is in its infancy.he longitudinal glia are a subclass of Drosophila neuropil glia that are born at the lateral edge of the embryonic CNS and migrate medially to the developing longitudinal axon tracts, where they modulate axon pathfinding, modulate axon fasciculation and promote neuron survival 11, 42 and 43.
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Cilium Definition. noun, plural: cilia. (biology). Microscopic, hair-like projection on the surfaces of some cells and of certain organisms. (botany). Any of the hair forming a fringe along the margin or edge of a plant structure, e.g. of a leaf.(anatomy). The eyelash.Supplement.efinition. noun, plural: cilia. (biology). Microscopic, hair-like projection on the surfaces of some cells and of certain organisms. (botany). Any of the hair forming a fringe along the margin or edge of a plant structure, e.g. of a leaf. (anatomy). The eyelash. Supplement.
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dressnoun uk â / dres / us â/ dres / See all translations. uk ​ /dres/ us ​ /dres/. A1 [ C ] a piece of clothing for women or girls that covers the top half of the body and hangs down over the legs: a long/short dress. a wedding dress. B2 [ U ] used, especially in combination, to refer to clothes of a particular type, especially those worn in particular situations:
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- mel·an·chol·y. n. 1. Sadness or depression of the spirits; gloom. 2. Pensive reflection or contemplation. 3.
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- Definition. noun, plural: lysosomes (cell biology) Organelle containing a large range of digestive enzymes used primarily for digestion and removal of excess or worn-out organelles, food particles, and engulfed viruses or bacteria. Supplement
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- The 4 chromosome is so small, constituting only about 5% of the total genome, that, for all practical purposes, it can be ignored. Thus, almost the entire genetic content of the. Drosophila genome resides on only three chromosomes: X, 2, and 3.
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zebra finch Check your grammar now! : a small Australian waxbill (Taeniopygia guttata synonym Poephila guttata) that is chiefly gray above and white below with a red or orange bill, a black-and-white barred tail, and in the male a black-barred throat and that is often kept as a cage bird.
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- 1 The fruit fly (Drosophila melanogaster, ‘ Drosophila ’ hereafter) is the most extensively used and one of the most well understood of all the model organisms.2  Drosophila fruit flies measure approximately 3 mm in length. 3  Drosophila larvae are small, white and glossy with a similar appearance to worms. The fruit fly (Drosophila melanogaster, ‘ Drosophila ’ hereafter) is the most extensively used and one of the most well understood of all the model organisms.
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- The fruit fly, Drosophila melanogaster, has been the most popular eukaryotic organism used in classrooms. It has been used in heredity and biomedical research where the aims are to understand human genetics and developmental processes.
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- Definition of Lysosome. Lysosome: An organelle (a little organ) in a cell containing enzymes that degrade macromolecules (large molecules) and other items (such as bacteria) taken up by a cell during the process of endocytosis.
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- Shown below is the structure of a Drosophila gene, divided into 10 segments, designated A-J. The gene contains three exns, two introns, a promoter an a site in I for poly(A) addition.